How do I get hair strands to curve in blender?
You could try increasing the number of segments. In my image that setting is greyed out, because I've done some particle edit after setting it. It needs to be set before editing the hair. 50 segments, like I have here, is overkill, I just set it to something high.
  

Lowering the Degrees setting under Render in the Particle settings may also help. To access that setting you'll need to activate Strand render.
You could also fiddle with the B-spline setting, but increasing the number of steps will slow things down.
  

Here are some settings I've just played with. The ones under Hair dynamics affect how fast and how far the hairs will fall.
  

And this is what I put together using those settings